A unique house in Las Vegas has an intriguing secret: another house, buried underneath it, 26 feet underground.

From the outside, the suburban two-storey abode at 3970 Spencer St. looks like a typical home (see Google Street view below).

But underneath the floorboards there is an entirely different structure - and it's built to withstand a nuclear strike. And instead of a typical industrial-style bunker, the shelter looks just like a house -- and even has a well-lit garden with fake trees, a starry sky and a hot tub.

The original owner Girard B. “Jerry” Henderson built the home in 1978 in fear of a nuclear war -- and wanted the ability to live for a year, full-time, underground. He also founded a company designed to promote and sell underground houses (without much success), having already made his fortune earlier in life.

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Artists Turn Nuke Bunker Into Art Gallery

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Visitors take a tour of contemporary art installation with a red light illuminating hanging neon tubes by Helsnki, Finland, artist Villu Jaanisoo displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project.(AP Photo/Amel Emric)

Visitor walk on a broken mirror on the floor art installation by Italian artist Alfredo Pirri as visitors tour contemporary art displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project.(AP Photo/Amel Emric)

An official explains a chess installation by artist Luchezar Boyadjiev from Sofia, Bulgaria, as visitors tour contemporary art displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project.(AP Photo/Amel Emric)

Visitors pose for photographs next to contemporary art displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project. (AP Photo/Amel Emric)

Visitor looks at the contemporary art item at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project. (AP Photo/Amel Emric)

Visitor walkS on a broken mirror art installation by Italian artist Alfredo Pirri as visitors tour contemporary art displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project.(AP Photo/Amel Emric)

Visitor walks inside the original communication room of the underground complex during and exhibition of contemporary art displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project. (AP Photo/Amel Emric)

Visitors take a tour of contemporary art installation with a red light illuminating hanging neon tubes by Helsnki, Finland, artist Villu Jaanisoo displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project.(AP Photo/Amel Emric)

Visitors take a tour of contemporary art with light painting on walls left and right by artist Edo Murtic from Croatia, displayed at the war bunker, near town of Konjic, 80 kms south of Sarajevo, Bosnia, on Friday, April 26, 2013, as the once secret bunker, built to shelter Yugoslavia's Marshal Josip Broz Tito and the communist leadership from a nuclear war, turns for three months into one of the world's quirkiest contemporary art galleries. The exhibition that opens Friday occupies most of the U-shaped complex some 280 meter (920 foot) deep underground that reportedly cost some US dlrs 4.6 billion to build but never served any purpose, and now turns into something that may put the sleepy Bosnian town of Konjic on the cultural map of Europe. Artists from 19 countries have worked for months on their performances and interventions in almost 100 rooms of the underground labyrinth, said Edo Hozic, the director of the project.(AP Photo/Amel Emric)